110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
|
/*---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
wpng - simple PNG-writing program writepng.h
|
||
|
|
|
||
|
|
---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
Copyright (c) 1998-1999 Greg Roelofs. All rights reserved.
|
||
|
|
|
||
|
|
This software is provided "as is," without warranty of any kind,
|
||
|
|
express or implied. In no event shall the author or contributors
|
||
|
|
be held liable for any damages arising in any way from the use of
|
||
|
|
this software.
|
||
|
|
|
||
|
|
Permission is granted to anyone to use this software for any purpose,
|
||
|
|
including commercial applications, and to alter it and redistribute
|
||
|
|
it freely, subject to the following restrictions:
|
||
|
|
|
||
|
|
1. Redistributions of source code must retain the above copyright
|
||
|
|
notice, disclaimer, and this list of conditions.
|
||
|
|
2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, disclaimer, and this list of conditions in the documenta-
|
||
|
|
tion and/or other materials provided with the distribution.
|
||
|
|
3. All advertising materials mentioning features or use of this
|
||
|
|
software must display the following acknowledgment:
|
||
|
|
|
||
|
|
This product includes software developed by Greg Roelofs
|
||
|
|
and contributors for the book, "PNG: The Definitive Guide,"
|
||
|
|
published by O'Reilly and Associates.
|
||
|
|
|
||
|
|
---------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#ifndef TRUE
|
||
|
|
# define TRUE 1
|
||
|
|
# define FALSE 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef MAX
|
||
|
|
# define MAX(a,b) ((a) > (b)? (a) : (b))
|
||
|
|
# define MIN(a,b) ((a) < (b)? (a) : (b))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);}
|
||
|
|
#else
|
||
|
|
# define Trace(x) ;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define TEXT_TITLE 0x01
|
||
|
|
#define TEXT_AUTHOR 0x02
|
||
|
|
#define TEXT_DESC 0x04
|
||
|
|
#define TEXT_COPY 0x08
|
||
|
|
#define TEXT_EMAIL 0x10
|
||
|
|
#define TEXT_URL 0x20
|
||
|
|
|
||
|
|
#define TEXT_TITLE_OFFSET 0
|
||
|
|
#define TEXT_AUTHOR_OFFSET 72
|
||
|
|
#define TEXT_COPY_OFFSET (2*72)
|
||
|
|
#define TEXT_EMAIL_OFFSET (3*72)
|
||
|
|
#define TEXT_URL_OFFSET (4*72)
|
||
|
|
#define TEXT_DESC_OFFSET (5*72)
|
||
|
|
|
||
|
|
typedef unsigned char uch;
|
||
|
|
typedef unsigned short ush;
|
||
|
|
typedef unsigned long ulg;
|
||
|
|
|
||
|
|
typedef struct _mainprog_info {
|
||
|
|
double gamma;
|
||
|
|
long width;
|
||
|
|
long height;
|
||
|
|
time_t modtime;
|
||
|
|
FILE *infile;
|
||
|
|
FILE *outfile;
|
||
|
|
void *png_ptr;
|
||
|
|
void *info_ptr;
|
||
|
|
uch *image_data;
|
||
|
|
uch **row_pointers;
|
||
|
|
char *title;
|
||
|
|
char *author;
|
||
|
|
char *desc;
|
||
|
|
char *copyright;
|
||
|
|
char *email;
|
||
|
|
char *url;
|
||
|
|
int filter; /* command-line-filter flag, not PNG row filter! */
|
||
|
|
int pnmtype;
|
||
|
|
int sample_depth;
|
||
|
|
int interlaced;
|
||
|
|
int have_bg;
|
||
|
|
int have_time;
|
||
|
|
int have_text;
|
||
|
|
jmp_buf jmpbuf;
|
||
|
|
uch bg_red;
|
||
|
|
uch bg_green;
|
||
|
|
uch bg_blue;
|
||
|
|
} mainprog_info;
|
||
|
|
|
||
|
|
|
||
|
|
/* prototypes for public functions in writepng.c */
|
||
|
|
|
||
|
|
void writepng_version_info(void);
|
||
|
|
|
||
|
|
int writepng_init(mainprog_info *mainprog_ptr);
|
||
|
|
|
||
|
|
int writepng_encode_image(mainprog_info *mainprog_ptr);
|
||
|
|
|
||
|
|
int writepng_encode_row(mainprog_info *mainprog_ptr);
|
||
|
|
|
||
|
|
int writepng_encode_finish(mainprog_info *mainprog_ptr);
|
||
|
|
|
||
|
|
void writepng_cleanup(mainprog_info *mainprog_ptr);
|